40 entries under reflex topic. ×

8
visceral(adjective, natural, primitive, instinctive, automatic)
6
native(adjective, natural, instinctive, automatic, inherent)
6
normal(adjective, natural, instinctive, automatic, inherent)
6
regular(adjective, natural, instinctive, automatic, inherent)
6
typical(adjective, natural, instinctive, automatic, inherent)
6
unlearned(adjective, natural, instinctive, automatic, inherent)
6
unmeditated(adjective, natural, unconscious, instinctive, automatic)
6
unpremeditated(adjective, natural, instinctive, unwilling, automatic)
6
unprompted(adjective, natural, instinctive, unwilling, automatic)
5
instinctive(adjective, emotional, unconscious, primitive, unwilling)
1
gut reaction(noun, expression, response)
1
robotic
1
spontaneous reaction(noun, expression, response)
0
Pavlovian response(noun, expression)
0
immediate response(noun, expression)
0
machine-like
0
mechanistic
0
systematic
0
unthinking response(noun, expression)
0
unthought-out response
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APASmart Define. (2013). knee-jerk thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/knee-jerk/thesaurus/synonyms
ChicagoSmart Define. 2013. "knee-jerk thesaurus" https://smartdefine.org/knee-jerk/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2013, knee-jerk thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/knee-jerk/thesaurus/synonyms>.
MLASmart Define. "knee-jerk thesaurus" 28 June 2013. Web. 28 September 2026. <https://smartdefine.org/knee-jerk/thesaurus/synonyms>